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58 lines
1.4 KiB
58 lines
1.4 KiB
package rpc
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import (
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"errors"
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"fmt"
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"reflect"
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)
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type MethodInvoker struct {
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call func([]reflect.Value) []reflect.Value
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parameterParsers []valueParser
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}
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func NewMethodInvoker(call func([]reflect.Value) []reflect.Value, parameterParsers []valueParser) *MethodInvoker {
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return &MethodInvoker{call, parameterParsers}
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}
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func (invoker *MethodInvoker) parseParameters(jsonArray []interface{}) ([]reflect.Value, error) {
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parsers := invoker.parameterParsers
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count := len(parsers)
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if len(jsonArray) != count {
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return nil, errors.New(fmt.Sprintf("参数长度错误!"))
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} else {
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parameterValues := make([]reflect.Value, count)
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for i, parser := range parsers {
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if parameter, err := parser(jsonArray[i], fmt.Sprintf("#%d", i+1)); err != nil {
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return nil, err
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} else {
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parameterValues[i] = reflect.ValueOf(parameter)
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}
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}
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return parameterValues, nil
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}
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}
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func (invoker *MethodInvoker) Process(jsonArray []interface{}) (interface{}, error) {
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if parameterValues, err := invoker.parseParameters(jsonArray); err != nil {
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return nil, err
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} else {
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returnValues := invoker.call(parameterValues)
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var err interface{}
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var result interface{}
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if len(returnValues) > 1 {
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err = returnValues[1].Interface()
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result = returnValues[0].Interface()
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} else {
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err = returnValues[0].Interface()
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result = nil
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}
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if err != nil {
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return nil, err.(error)
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} else {
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return result, nil
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}
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}
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}
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